EP 0511809 A2 19921104 - Radiofrequency focusing of magnetic resonance images.
Title (en)
Radiofrequency focusing of magnetic resonance images.
Title (de)
Hochfrequenz-Fokussierung von Bildern der magnetischen Resonanz.
Title (fr)
Focalisation radiofréquence d'images RMN.
Publication
Application
Priority
US 69451491 A 19910430
Abstract (en)
Apparati and methods for magnetic resonance imaging a selected interrogation volume in a tissue of a human or animal body, to provide increased signal-to-noise ratios for fixed data acquisition times. The method involves excitation (11, 12, 13,15,17) of magnetic resonance in a selected interrogation volume that may be as small as 500-3,000 cm<3>, through controllable focusing or steering of a rotating magnetic field signal used to induce magnetic resonance. The response signals issued by the excited volume element are then collected (19, 21) by focusing of these response signals, using a phased array of antennae for this purpose. Use of the invention with well known nuclear magnetic resonance excitation procedures, such as spin echo, echo planar, gradient recalled and backprojection, are discussed. <IMAGE>
IPC 1-7
IPC 8 full level
G01R 33/3415 (2006.01); G01R 33/56 (2006.01)
CPC (source: EP US)
G01R 33/3415 (2013.01 - EP US); G01R 33/56 (2013.01 - EP US); G01R 33/5659 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0511809 A2 19921104; EP 0511809 A3 19930414; US 5252922 A 19931012
DOCDB simple family (application)
EP 92303773 A 19920427; US 69451491 A 19910430